Clamp for flasks.



E7 G. GOVBRT. GLAMP son rLAsKs.

APPLICATION TILE!) SEPT. 11, 1911.

1,027,695. Patented My 28,1912.

zzdeizorf COLUMalA PLANQURAPH co.,WASHlNuToN'. D. c.

UNITED sTATEs PATENT oEEioE,

EDSON C. COVERT, 0F CHICAGO, ILLINOIS, .ASSIGNOR TO AMERICAN STEELFOUNDRIES,

OF NEW YORK, N. Y., .A CORPORATION OF NEW JERSEY.

CLAMP FOR FLASKS.

Specification of Letters Patent.

Patented May 28,1912.

To all 'whom t may concern `Be it known that I, EDsoN C. CovERT, acitizen ofthe United States, residing at Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Clamps for Flasks, of which the following is a specification.

My invention relates to clamps and has reference to a novel,quick-acting, pneumatic clamp for use on flasks.

In the art of molding, particularly in co nlnection with the use ofmolding machines,

clamps are 'necessary for holding the flask and drag or cope in placewhile the jarring or tamping action is secured. In order to secure thebest results these clamps should be so constructed that they may beVapplied or removed quickly and hold the parts securely together. I havetherefore designed and show in the accompanying drawings a form of clampadapted for use on the pattern plate of a molding machine, this clampbeing actuated by fluid pressure and being self-adjustable to variations1n the articlesto be clamped.

My invention will be more readily understood by reference to -theaccompanying drawings, wherein,

Figure 1 is a section through a pattern plate and flask, my novel clampbeing shown iielevation; Fig. 2V is a bottom plan view of the patternplate a part thereof being broken away, and Fig. 3 yis, an end elevationof the clamp, flask and plate. i

Referring more particularly to the" draw: ings, itwill be seen that to aplate 10, having downwardly projecting flanges 11, 12,' I attach bymeans of suitable bolts, a cylinder 13. This cylinder is connected at 14to a suitable source of fluid pressure, not shown. Within the cylinderis seated a piston 15, connected to a piston rod 16. To the end'of therod 16 is connected a bifurcated member 17, the two legs of the member17 passing through openings provided therefor in the depending flange12. Near the outer'ends Vof the member 17 and extending downwardly isprovided a recess 18, having a verf tical wall on one side and on theother sideV ing jaw 21 is mounted for oscillation on the pin 20, the pinpassing through a slotted opening 22, in the body portion of the jaw.

`By means of the slot, the clamping liaw is permitted a limited bodilymovement in line vwith the Slot. The lower end of the jaw 21v isprovided with an opening through which a pin23 is inserted, this pin23'being preferably of substantially the same size as the opening 18. Aflask 24: is shown seated on the pattern plate, this ask being providedwith a flange 25 with which the jaw member 21 coperates.

As shownin Fig. 2, I prefer to provide two clamps to each patternplat-e, these clamps being mounted on the diagonal corners. Inasmuch asthe other clamps are duplicates of the onerjust described, a furtherdescription willnot be made.

-rIhe operation of the device is as follows: A flask is placed on thebase, the jaw of the` clamp being then in the dotted line position ofFig. 1. Fluid under pressure is admitted to the rear of the piston 15,thus causing its advance and the advance of the member 17, within therecess 18 of which the pin 23 is seated. This will cause the jaw memberto rotate about the pin 20 and bring the jaw of the member 21 intocontact with the vflange 25 of the flask. Further advance of the pistonand the member 17 willcause the unseating of the pin 23 from the recess18, and tend to shift or wedge the jaw member downward because of theincline 19, this shift-ing being permitted by the slot 22. It will beseen that' by this means an extremely strong gripping action is securedand that the holding power will be maintained easily and withoutmaintaining the full fluid pressure necessary to`secure the grippingaction.

I claim:

1. A clamp comprising, in combination, a

support, a clamp member rotatably and slidably connected to saidsupport, a reciprocating member arranged to act upon said clampingmember, and Huid pressure means for actuating said reciprocating member,substantially as described.

2. A clamp comprising, in combination, a base, a clamping j aw rotatablyand slidably connected to said base, a reciprocating member arranged tocause rotation of said clamping jawwhen shifted in one direction androtation and wedging when shifted in another direction, and means foractuating said reciprocating member, substantially as described.

3. A clamp comprising, in combination, a

base Vhaving a pin7 a clamping jaw provided with a slot, said pin beingseated in said slot, a pin carried by said clamping jaw, a reciprocatingmember having a recess and an inclined approach to said recess, the pinon said clamping jaw cooperating with said recess and said inclinedapproach, and means for actuating said reciprocating inember,substantially as described.

4. A clamp comprising, in combination7 a support, a slotted lever havinga clamping jaw associated with said support, a reciproeating member, andmeans associated wit-h said reciprocating member and said lever and soarranged that on the motion of said reciprocating member in onedirection said. lever is simultaneously rotated and wedged downward, andmeans for shifting said reciprocating member, substantially asdescribed.

EDSON C. COVERT. Witnesses:

HENRY J. KLAER,

STANLEY H. KERsHAw.

Copies of this patent may be obtained for ve cents cash, by addressingthe Commissioner of Patents, Washington, 1D. C.

